The priority given to environment in the public action is not disputable, even if individual behaviors as enterprises operating modes are also essential. But the difficulty rests in the frequent contradictions between political exigences and the technical realities. It then occurs that to answer politician considerations, the States take decisions in the name of the protection of the environment which lead to results contrary to the expected results due to an ignorance, unvoluntary or not, of the consequences of their action. That situation is not limited to France and we have observed similar cases in Germany and even in the ...